yr.load_state

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yr.load_state#

yr.load_state(timeout_sec: int = 30) → None[source]#

Used to load the saved instance state.

Parameters:

timeout_sec (int, optional) – The timeout in seconds. Defaults to 30.

Returns:

None.

Raises:

  • RuntimeError – If load_state is not called in local mode, an exception is raised with the message: load_state is not called in local mode.

  • RuntimeError – If load_state is called in cloud mode without using the POSIX API, an exception is raised with the message: load_state is only supported on cloud with POSIX API.

  • RuntimeError – If load_state fails to retrieve the saved instance state, an exception is raised with the message: Failed to load state.

Example

>>> @yr.instance
... class Counter:
...     def __init__(self):
...         self.cnt = 0
...
...     def add(self):
...         self.cnt += 1
...         return self.cnt
...
...     def get(self):
...         return self.cnt
...
...     def save(self, timeout=30):
...         yr.save_state(timeout)
...
...     def load(self, timeout=30):
...         yr.load_state(timeout)
...
>>> counter = Counter.invoke()
>>> print(f"member value before save state: {yr.get(counter.get.invoke())}")
member value before save state: 0
>>> counter.save.invoke()
>>>
>>> counter.add.invoke()
>>> print(f"member value after add one: {yr.get(counter.get.invoke())}")
member value after add one: 1
>>>
>>> counter.load.invoke()
>>> print(f"member value after load state(back to 0): {yr.get(counter.get.invoke())}")
member value after load state(back to 0): 0
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